Quick answer: For a clean aluminum-extrusion cut, use a rigid saw, a sharp non-ferrous blade with suitable tooth geometry, secure the profile without distortion, control chips and lubricant, and measure squareness and cut length after deburring. The best setup depends on profile size, wall thickness, alloy, batch size and finish requirements.
Choose the Cutting Process by Requirement
| Process | Best suited to | Watch for |
|---|---|---|
| Cold saw | Production cuts requiring good squareness and finish | Blade condition, coolant and chip control |
| Carbide circular / miter saw | General profile cutting and accurate angles with the correct blade | Secure clamping and safe chip containment |
| Band saw | Large sections, bundles or lower cutting-force needs | Blade wander, slower cycle and rougher finish |
| CNC machining center | Cutting combined with holes, slots or end features | Workholding distortion and datum control |
Blade and Tooth Selection
Use a blade intended for non-ferrous metals and match tooth pitch to the thinnest wall engaged. Too few teeth can catch a thin wall; too many teeth can pack chips and increase heat. Follow the blade and machine manufacturer’s approved speed, feed, lubrication and guarding recommendations.
Clamping Without Crushing the Profile
- Support the section close to the cut.
- Use soft jaws or shaped supports where cosmetic surfaces matter.
- Clamp enough to prevent movement, but do not deform hollow or thin-wall profiles.
- For repeated lengths, verify stop position against burrs and thermal buildup.
- Support the offcut so it does not tear the final wall.
Cut, Deburr and Inspect
- Confirm the drawing datum and finished-length requirement.
- Cut with stable feed; do not force a dull blade.
- Remove internal and external burrs without rounding a controlled edge.
- Clean chips from cavities and T-slots.
- Measure length, squareness, angle and surface damage using the agreed method.
Common Defects and Corrections
| Defect | Likely causes | Correction direction |
|---|---|---|
| Heavy burr | Dull blade, wrong tooth geometry, unstable feed | Replace/select blade and stabilize feed |
| Out-of-square cut | Blade deflection, poor support or loose fixture | Check blade alignment, support and clamp |
| Chipped anodized edge | Aggressive tooth engagement or poor support | Use suitable blade, backing and process trial |
| Profile deformation | Excess clamping or unsupported thin wall | Use shaped jaws and distributed support |
RFQ Information for Cut Extrusions
- Alloy, temper and profile drawing
- Cut length and tolerance
- Squareness or angle tolerance
- Burr and edge-break requirement
- Cosmetic surface zones and finish
- Inspection sampling and packaging
Send the profile drawing, cut tolerance and finish requirement with the RFQ.
Post time: Jul-16-2025